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Stock Options - Weighted Average Fair Values and Assumptions (Details) - Employee Stock Option - $ / shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Stock Options
Weighted average fair value of options granted (in dollars per share)	$ 2.56	$ 2.67
Risk-free interest rate	4.34%
Expected term (years)	6 years
Expected volatility factor	75.35%
Expected dividends	0.00%	0.00%
Minimum
Stock Options
Risk-free interest rate		1.94%
Expected term (years)		3 years
Expected volatility factor		62.00%
Maximum
Stock Options
Risk-free interest rate		4.09%
Expected term (years)		6 years 5 months 1 day
Expected volatility factor		79.00%

X

- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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- Definition

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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